hw/ppc: Support machine-default audiodev with fallback

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

hw/ppc/prep.c

@@ -45,6 +45,7 @@
 #include "trace.h"
 #include "elf.h"
 #include "qemu/units.h"
+#include "audio/audio.h"
 
 /* SMP is not enabled, for now */
 #define MAX_CPUS 1
@@ -310,6 +311,10 @@ static void ibm_40p_init(MachineState *machine)
         dev = DEVICE(isa_dev);
         qdev_prop_set_uint32(dev, "iobase", 0x830);
         qdev_prop_set_uint32(dev, "irq", 10);
+
+        if (machine->audiodev) {
+            qdev_prop_set_string(dev, "audiodev", machine->audiodev);
+        }
         isa_realize_and_unref(isa_dev, isa_bus, &error_fatal);
 
         isa_dev = isa_new("pc87312");
@@ -426,6 +431,8 @@ static void ibm_40p_machine_init(MachineClass *mc)
     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("604");
     mc->default_display = "std";
     mc->default_nic = "pcnet";
+
+    machine_add_audiodev_property(mc);
 }
 
 DEFINE_MACHINE("40p", ibm_40p_machine_init)